Anchor strip for securing finishing structures to concrete



Nov. 24,1925- 1,562,784

R. K. OLSEN ANCHOR STRIP FOR SECURING FINISHING STRUFIURES TO CONCRETE Filed March 23, 1922 Sheets-Sheet l NOV. 24I R. K. OLSEN ANCHOR STRIP FOR SECURING FINISHING STRUCTURES TO CONCRETE 2 Sheets-Sheet 2 Filed March 23, 1922 anwwtoz R K'. OL EN. Q-W, wm M amm- Patented Nov. 24, 1925.

m nimis ,0.I..S..E1T r t ne s-a NEEBAT iKA- Application filed 'lfvlarch 28, 1922. 'Elerial No. 548,991.

To all whom/it may canoe rm:

Be it kllOWIl that 1, RUDOLPH K. lLSlEN, a citizen off-the ZUnited states and a resident -o f-Oinaha, in the county of Douglas and 5 -State of Nebraska, have invented certain new and useful In' provenients tin Anchor Strips for Securing Finishing Structures to Concrete oi? which the following is a speciiication.

My invention relates to composite building'structures wherein concrete or a like material forms the principal or supporting struoture, -to which :the trim or finishing materials are attached to form the floors, ceilings, interior and exterior wallwsuri'aces and the like. It is the object of any invention to provide a simple, inexpensive and easily applied lineans 't'or securely anchoring to the supporting structure of concrete the various trim or =l'in'ishing materials which 'it may be desiredto attach thereto. A itur-ther object of any invention is to providesiniple and effective means 130i securing :the an choring devices in the (molds or forms in which the concrete structure is retained while in a plastic condition.

In the accompanying drawings Fig. 1 is a perspective View showing the application of any invention for anchoring and l alining floonsleepers upon aconcrete slab or base,

Figs. 2 to 6, inclusive, are perspective -views showingvarious inodifica-tionsotlthe anchoristrip providedthy iny invention, Fig. *7 .is a

transverse sectional view through a portion [of/the forms ifOI a concrete heain and floorslab, showing my anchoring devices in place in the plastic material, and Fig 8 is asinii- :lar view with the forms removed, showing the anchoring .devices :in use :iior securing floor-sleepers and .noetal lath to theconcrcte structure.

The, anchoring devices PIOVlClGCl byuny 1nmention comprise, essentially, elongated stripsof sheet metal which areidisposed at the surface of the concrete structure, the strips having integral fiangewportions ,Which extend into :the concrete perpendicularly to .the surface at which 1 the lbOCllES of .the strips lie, :the inwardly extended flange-portions "being perforate whereby portions of the attached-to the stripihody at one edge and heing'hendahle outwardly =t'ro1n therstrip and (the iace or the concrete, wherehylto -forin nieinhers to which the ,desired finishing structures may be attached and :thus secured to theconcrete support.

Referring particularly .to @Fig. 2,, the anchor-strip there shown comprises the 511211; ibody-portion :9 of which the longitudinal edgewportions are turned .downwardly ;to form the continuous flanges d0, so that ;in transverse section the strip is a rectangular U or channel-shape. tlfhe flanges 10 each has aseuiesot' rectangular ipeiiiiorations l1 therein, and also at intervals :has series of SllltlllrGllGlllfil perforations 112,1i01 a purpose 'to be hereinafter uioted. At positions tunil ormly spaced longitudinally of the ,strip, :the :tongues :13 are .cut atherofron said tongues being in opposite adjacent pairs, each pair being aforined by an "$-shaped slit lllrtlle body 9. illhus when any ;pair,olf-,the tongues.v are bent, outwardly to ,positions ,peripendiculareto the flat body'llnthe spas-entrain which they are removed is ,a single rectangular opening in .the body, ,as shown at :theilower portion otthe figure, and bydotted lines at :the ,upper portion ithereof. N01:- nially, .or .until the tongues ,are to ;he used,

the same .are deft in the {flat or unerected positions, coincident avith .the plane ,of the 'hody1portion, asshown :hyithe full lines at the upper part of tlie figure. {Each ,ofithe tongues :13-preferably:has a number oiis n-all circular openings .1i4;-11'1il(l6 therein, to ,tfacilitate the attachment est-the trim ,or finishing structures thereto, ;,and also to readily enable thetackingotgthe anchor strip to ,the inner sidesiof molds or-:forins into-which the zilasticiconoreteqis pQured. .Ilhebo dy 9 also l1flS fl;11lllIlb6I;O-f perfQl'atiQnspr, openings .15 formed therein 1 z t-(positions intermediate the pairs eta-tongues 11.

:One of the principal uses-tor -Wl1lol1,1ny

anchor-strips are adapted, is illustrated in Fig. 1, which represents the same as employed for anchoring and alining floor-sleepers upon a concrete slab or base. For this purpose, the flanges 10 of the strips are embedded in the concrete while the same is in a plastic condition, the strips being disposed substantially parallel with each other, suitably spaced apart, and with the flat bodyportions 9 flush with the surface of the concrete. lChe anchor-strips may be set in the concrete after the same has been poured and levelled, but while it is still soft and unset, the insertion of the flanges 10 into the plastic material being readily effected, owing to the slight displacement of the material necessary for the edgewise entry of the flanges therein, and also by reason of the fact that air trapped between the partiallyinserted flanges may escape freely through the openings 15 in. the fiat body 9. If desired, however, the anchor-strips may be placed in the forms or molds prior to the pouring of the concrete therein, and when this is done, thefiat body-portions 9 may serve as guides or gages for the levelling off of the plastic material, it being remembered that the tongues 13 are left in the flat or unerected positions until needed for use. A convenient means for supporting the anchorstrips in the form or mold, prior to the pouring of the concrete, is shown at the left of Fig. 1. A wire of suitable size and length has the middle portion thereof formed into a series of zig-zag bends 16, thereby constituting a base which may rest upon the bottom of the form or mold. From said base, portions 17 of the wire are extended upwardly to pass between and rest against the inner sides of the flanges 10 of the anchor- .strip, and the terminal portions 18 of the wire are then turned outwardly to extend through an opposite pair of the perforations 12 in said flanges 10. It will be noted that the perforations 12 are disposed at different heights in the flanges, so that some variation may be made in the heights at which the anchor-strips are supported above the base 16 of the wire support. The ends 18 are readily engaged in the openings 12 by springing the vertical parts 17 toward each other, and then inserting the ends 18 in the holes 12 allowing the vertical parts 17 to spring outward to retain the ends in the holes. After being so engaged with the anchor-strips the wires are not liable to be accidentally disengaged therefrom, so that a number of the wires may be attached to one of the anchor-strips, the same then set at the desired position in the form, and secured in such position by tacking or stapling the bases 16 to the bottom of the form on which they rest.

After the concrete in the slab A has become suitably hardened, the tongues 13 are turned up to vertical positionse and the floor-sleepers B are inserted between the same, each sleeper, in the construction shown, extending longitudinally of one of the anchor-strips and thus lying between all of the pairs of tongues 13 thereon. The sleepers are adjusted vertically to bring the up per sides thereof to a common level, and are then secured in said adjusted or levelled positions by means of nails driven into the sides thereof through the openings 14: in the tongues. In cases where a joint or splice of the sleepers occurs at a position intermedi ate the tongues 13, it is preferable to employ a splicing-piece-19, as shown at the right of Fig. 1, said splicing-piece comprising a short strip of sheet metal bent to a channel shape and embracing the abutting ends of the sleeper-sections, the latter being secured thereto by nails driven through perforations in the side-portions of the channel. Looseness or downward springing or warping of one of the abutting ends of the sleeper-sections, relative to the other, is thus prevented. After the sleepers have been levelled and secured to the anchor-strips over a considerable area, the spaces between the same may be filled with cinders or other desired material (not indicated in the drawing), and the floor C then laid thereon in the usual manner.

It will be observed that when my anchorstrips are employed as above described, for attaching floor-sleepers to a concrete slab or base, the sleepers may be readily and quickly laid, since the anchor-tongues are in substantially perfect alinement with each other, the alinementof all of the tongues upon any strip being insured by the rigidity of the channel-shaped portions of the strip which connect them, and any mis-alinement of the several strips, relative to each other in any section of the floor, being easily compen sated by raising or lowering the sleepers relative to the tongues 13 before nailing the sleepers thereto.

In Fig. 3 there is shown a slightly modified form of the anchor-strip, wherein the tongues 131 extend transversely of the bodystrip 91, being formed by H-shaped slits in the material, said tongues being adapted for use with sleepers extending transversely of the strips, instead of longitudinally as in the structure first described. The anchor-strips of this form are employed in the same general manner as in the first-described form, but they may be spaced at somewhat greater distances apart, thus effecting a certain economy of material. It is desirable when setting these anchor-strips in the concrete that all of the strips be started from the same base-line, which will insure the desired transverse alinement of the tongues 131 upon the several strips, without measurement or other troublesome procedure. The

flanges 101 are shown as provided with large circular perforations 111 therein, which will be understood as equivalent to the rectangular perforations 11 in the flanges 10 of the strips 9., audit will be obvious that the .per- .fo-rations of the concrete-embedded flanges may be of any suitable shape such .that the plastic material will iflow through the same and thus bond the flanges securely in the body of the concrete. The perforations 121 in the flanges 101, the perforations 151 in the body-strip 91, and the openings 141 in the tongues 131, will be understood as equivalent, respectively, to the perforations 12, 15 and 14, of the first-described anchor-strip.

In that form of the anchor-strip shown in Fig. 1, the flanges 102 are notched or serrated, so that said flange-portions are almost discontinuous longitudinally. This form of the anchor-strip is suitable for use where it is desirable that the same have a certain longitudinal flexibility, as where it is required that the same conform with a surface having more or less curvature. Except for J the difference in the flange-portions, this type of the anchor-strip is substantially the same as that shown in Fig. 3.

A further modification of the form of the anchor-strip is represented in Fig. 5, wherein the side flanges 103 are relatively short, and have therein only the small perforations 123 for receiving the endportions 18 of the wire seating-members. The main flanges 100, for embedding in the concrete, and which are provided with the bonding-perforations 113, are each formed by slitting the body-strip 93 at three sides of a rectangular portion thereof, and bending downwardly the elongated tongue or flange-section thus formed, each of the flange-sections remaining attached at one side to the body-strip, and the successive flange-sections being preferably staggered or alternating from side to side of the body-strip. In this form of the anchorstrip a slightly narrower piece of sheet metal may be used, from which to form the strip, than in the preceding forms wherein the side flanges are of greater depth and the bodystrip is continuous except for the portions cut out to form the tongues 13, 131 and 132. It will be noticed that in the modification now under consideration, that the strip has a ladder-like form, there being at each side a continuous angular or L-shaped part, these L-shaped side-portions being connected to each other by a series of longitudinally spaced cross-bars, between which the material is displaced to form the tongues 133 and the deep flanges 100.

A further modification of the anchor-strip structure is illustrated in Fig. 6, wherein the side flanges 104 are relatively short, and the intermediate portions of the body-strip 9- 1: consist of a series of longitudinally spaced transverse bars which are bowed down- .ered by the concrete, leaving at. the surface thereof only the tongues 134 .whiclrare .ini-

.tially in the flator une-rected positions shown at the lower part of the figure, and which for use are turned outwardly to the ,positions shown at the upper part of the figure.

Referring now to Fig. 7, there is shown in transverse section, portions of the forms or molds for making a concrete beam or floorjoist integrally with floor-slabs A, the mold or form comprising the arch-pans E supported upon soflits F, the latter being the bottom of the form for the joist D. In this which is a common type of concrete floorconstruction,my anchor-strips may be used for retaining the floor-sleepers, as previously described, and may also be placed in the bottom of the joist D, to serve subsequently for the attachment thereto of metal lath G, as represented in Fig. 8. For the last-named use of the anchor-strips, the same are placed in the mold or form prior to the pouring of the concrete therein, the strips being inverted so that the flanges 10 extend upwardly, and being secured to the sofl'its F by tacking through the perforations 14 in the tongues 18. After the concrete is poured and hardened, and when the forms are re moved, the soffits F easily become detached from the tacking, without loosening the anchor-strip from the concrete more than to eflect a slight downward bending of the tongues 13. Then, when the metal lath is to be applied, the tongues are bent to extend straight down, as indicated by dotted lines in Fig. 8, and after the tongues pass through the slots or openings of the lath they are again bent or clinched against the lower side of the lath, whereby to securely retain the same upon the joists. By this means of attachment, the metal lath may be quickly and smoothly applied, and the subsequent plastering thereof greatly facilitated.

From the illustrated and described examples of the structure and manner of use of anchor-strips embodying my invention, it will be apparent to those skilled in the art that the same may be embodied in a great variety of forms, and may be used in almost every situation where it is desirable to at tach or anchor to a concrete supporting structure a trim, finish, or surfacing which is applied subsequently to the molding and hardening of theconcrete.

Now, having described my invention, what I claim and desire to secure by Letters Patent is:

1. Anchoring means for securing finishing structures to concrete supports, comprising a relatively long strip of sheet metal, the body-portion of said strip disposed at the surface of the concrete, continuous flanges integral with the longitudinal edges of the strip and extending into the concrete and a series of longitudinally spaced perforate tongues slit from the body-portion of the strip intermediate said continuous longitudinal flanges, said tongues normally lying in the plane of the body-portion and being bendable to extend outwardly therefrom whereby to project from the surface of the concrete at uniformly spaced and alined positions.

2. A structure as set forth in claim 1, including perforate tongues slit from the bodyportion of the strip intermediate the continuous longitudinal flanges and extending therefrom into the concrete.

RUDOLPH K. OLSEN. 

